I second laddyjoes sentiment re feeding tube.
You may no like the idee of it but once you have and are used to it, it it is no big deal. Also, it is easier if you get this early, Reember the radiation will dammage your neck/throat and if you wait long enough I cannot helpo but think that the PEG insertion will be a lot more uncomfortable.
I reccomend it for amongst other things for peace of mind and it also helps with getting sufficient fluids. That said I have a PEG tube and I have 8 rads left. So far my weight loss has not been bad at all and I still eat normally, that is by mouth. I use the PEG tube for water only at this point. Also pleae realize, some people are very lucky as far as sideeffects are concerned, but you should not count on it, I did not. Do I regret getting it. No.

Best wishes

Markus